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Oct 12, 2018
Common Defects in 304 Stainless Steel Pipe Welds
a) weld bead b) crack c) slag inclusion d) pore e) undercut f) incomplete penetration
(1) Overlap. The welding rod melts too fast, the arc is too long, the current is too large, the welding speed is too slow, and the welding rod is improperly moved.
(2) Slag inclusion. The molten pool is not stirred during welding, the weldment is not clean, the current is too small, and the slag is not completely removed during layered welding.
(3) Cracks: Unreasonable welding structure design, improper welding process, too fast cooling of the weld, and high carbon, sulfur, and phosphorus content in the weldment.
(4) Gas pores. The weld is unclean, the electrode is wet, the arc is too long, the welding speed is too fast, the current is too high, and the carbon content in the weld is high.
(5) Undercut. The current is too high, the electrode is improperly moved, the arc is too long, and the electrode angle is incorrect.
(6) Incomplete penetration. The current is too high, the welding speed is too fast, the weld is unclean, the electrode is not aligned with the weld, and the groove is too small.
Read a full guide: How to Perform Nondestructive Testing on 304 Stainless Steel Pipe Welds?
Article source: https://article-realm.com/article/Business/84785-Common-Defects-in-304-Stainless-Steel-Pipe-Welds.html
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https://www.permanentsteel.com/Permanent Steel Manufacturing Co.,Ltd (PMC) have years of experience in manufacturing of carbon steel pipe, stainless steel tube, hollow section, pipe fittings.(Fluid Pipe/Boiler Tube/Fire Pipe/Line Pipe/Structure Tube) Please refer to: https://www.permanentsteel.com
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